How to adjust container to accomodate taller menu centered

I adjusted the height of my centered menu to be 64px high. However, now there doesn’t seem to be enough top padding/margin in the main content section when viewed above 990px wide. How can I adjust this properly?

This is the code I added to make the menu taller.

.html_header_top .av_bottom_nav_header .main_menu ul:first-child > li a {
height: 64px;
padding-top: 14px;
}
.html_header_top.html_bottom_nav_header .main_menu > div, .html_header_top.html_bottom_nav_header .main_menu ul:first-child {
width: 100%;
height: 64px;
}